The baby can be representing part of you. It can represent your gifts, your responsibilities or something you are trying to nurture in your life. Since the head fell off, it is showing that whatever the baby is representing you are having a hard time keeping it together and keeping it functional. So may I ask what you feel that you struggling with in your personal life?
Yes then this is what the baby would be representing as you are having a hard time keeping the baby's head on, meaning keeping this nurturing part of your life intact. Is there anyway you can relieve some of these things that are causing you this stress? I can understand the stress that would come with taking care of your elderly father. May I ask why you are worrying about your husband?
Yes that would be very hard at his age. He must be a very strong mentally and physically to go through all that. May I ask if you believe in God? Do you ever go to God for your worries and stress? If not, do you have any way to relieve your stress? Hobbies, anything that would allow your mind to be released for a small amount of time each day?